AMD Delivers OverDrive Overclocking Support For AMDGPU DRM Driver
Written by Michael Larabel in Radeon on 13 May 2016 at 03:09 PM EDT. 44 Comments
RADEON --
AMD has published patches today for the AMDGPU Linux kernel DRM driver that finally make it possible to overclock the GPU when using the open-source driver.

Developers at AMD have made public a set of six patches for providing initial OverDrive support for the graphics engine on the AMDGPU DRM driver. This set of patches enable overclocking the GPU core by up to 20% in 1% increments.

While OverDrive has been around for a while, this OD implementation is just for AMDGPU and currently supports Tonga, Fiji, and Polaris hardware.

Utilizing OverDrive with the AMDGPU DRM driver isn't too user-friendly with having to write your desired (integer) percentage between 0 and 20 to the new pp_sclk_od sysfs entry that will appear when using a patched kernel. You can also read from this pp_sclk_od file for finding out the percentage of your current overclock.

More details via this patch series. It might be too late to see this OverDrive support land for Linux 4.7, but anyhow will work on patching a kernel build this weekend and running some benchmarks!
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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